Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
3/30/2026 9:36:35 PM EDT
For a Tisas 9mm 1911 Carry.  I know the K is a little narrower so does it fit the slide better or not that much of a difference?

Anybody have pictures to share of your 1911 with optics and who milled your slide?
3/31/2026 8:52:25 AM EDT
[#1]
The 507C will need a plate of some sort, the 507K will mount directly to the slide.
3/31/2026 9:12:52 AM EDT
[#2]
I had a 507K on a Prodigy for a little bit and it was definitely too small. Went to a full size EPS which was much better.
3/31/2026 9:42:01 AM EDT
[#3]
I went with a Vortex Defender CCW Enclosed on my Tisas Nighstalker 9mm. Its a direct mount fit.


"Life is Hard, its Harder if You're Stupid" - John Wayne
4/2/2026 1:26:40 PM EDT
[#4]
Most recently I added an Olight to my Tisas.  Just a trial for the brand but it did drop right on the tight K cut which made me happy.


I had one milled by a company that failed and have a Holosun K on it.


I like the size factor on both of these vs the EPS which is wide in comparison.  The guns point well and the dot is easy to index.  The slides also swap between guns without issue.
4/4/2026 4:06:22 PM EDT
[Last Edit: dmk0210][Edited] [#5]
Originally Posted By downrivertrash:
For a Tisas 9mm 1911 Carry.  I know the K is a little narrower so does it fit the slide better or not that much of a difference?
View Quote
Yes. The 507K or EPS Carry would be the way to go. 507C and EPS would be too wide.

I got a spare optics ready slide for my Carry from SDS. I had a 507K on it and it fit perfectly. I later swapped the 507K to another gun and now I have a Swampfox Sentinel on there.
4/4/2026 4:35:02 PM EDT
[#6]
Quote History
Originally Posted By dogtired:
Most recently I added an Olight to my Tisas.  Just a trial for the brand but it did drop right on the tight K cut which made me happy.
https://i.postimg.cc/PrZ2NmMx/IMG_5017.jpg

I had one milled by a company that failed and have a Holosun K on it.
https://i.postimg.cc/zfS1TLL1/IMG_9149.jpg

I like the size factor on both of these vs the EPS which is wide in comparison.  The guns point well and the dot is easy to index.  The slides also swap between guns without issue.
View Quote


I have several Holosuns.

I recently put on Osight SE on a Springfield Operator.  I'm impressed with it and will probably continue getting Osights over the Holosuns.
Nobody is coming. It's up to you.
4/4/2026 9:35:43 PM EDT
[#7]
I have plenty of Holosuns and recommend them without reservation.  I just bought a pair of Osights and am impressed.  Time will tell if they offer the ruggedness of the Holosun.  My only desire would be for a dot vs circle dot.
7/26/2026 1:10:54 PM EDT
[#8]
Are the slides now unobtainable?
7/27/2026 8:01:05 PM EDT
[#9]
Quote History
Originally Posted By Lancelot:
Are the slides now unobtainable?
View Quote


As far as I know, Yes, but Tisas said that they plane on selling parts when every thing get settled.
7/30/2026 3:29:33 PM EDT
[#10]
Quote History
Originally Posted By bluedog82:
I had a 507K on a Prodigy for a little bit and it was definitely too small. Went to a full size EPS which was much better.
View Quote


I would also recommend the full size EPS.  In the Pic below, you can see an EPS vs a 507K.
Attached File

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In